KR101304114B1 - Ｒｅｓｏｕｒｃｅ ｍａｐｐｉｎｇ ｍｅｔｈｏｄ ｏｆ ｃｏｎｔｒｏｌ ｃｈａｎｎｅｌｓ - Google Patents

Abstract

The present invention relates to a resource mapping method of a control channel, wherein the broadcast control channel is located in one frequency partition, the frequency partition includes one or several distributed resource units, and the initial position of the broadcast control channel is It involves installing on the first distributed resource unit. According to the present invention, the problem of resource location and method occupied by the control channel is solved, and the performance of the control channel is improved, and the control channel can meet various requirements such as low error rate, resource mapping of the OFDMA system, and interference suppression. Frequency spectrum efficiency of wireless communication system based on OFDMA technology is secured.

Description

Resource Mapping Method for Control Channels

The present invention relates to the field of communications, and more particularly, to a method of resource mapping of a control channel.

In a wireless communication system, a base station refers to a facility that provides a service for a terminal and communicates with the terminal through an up / down link, where the down direction means the direction from the base station to the terminal and the up direction is from the terminal to the base station. It means the direction. In data transmission, several terminals may simultaneously transmit data toward the base station on the uplink and may receive data from the base station on the downlink at the same time. In a radio communication system employing a base station to implement radio resource scheduling control, scheduling allocation of system radio resources is completed by the base station. For example, the base station provides downlink resource allocation information when the base station performs downlink transmission and uplink resource allocation information when the terminal performs uplink transmission. The resource allocation information includes information such as actual physical resource location and transmission method. In a communication system implemented based on different technologies, resource allocation and resource mapping requirements and methods are also different.

In a wireless communication system based on Orthogonal Frequency Division Multiple Access (OFDMA) technology, a base station completes mapping of radio resources and allocation of radio resources. The OFDMA technique is implemented based on Orthogonal Frequency Division Multiplexing (OFDM) technique. The main implementation of the technique is to subchannelize the available subcarriers and transmit data on the subcarriers. The user implements multiple access through different subframes.

For example, the base station determines the system configuration and resource allocation information for the downlink transmission from the base station to the terminal, and the system configuration and resource allocation information for the uplink transmission from the terminal to the base station. The allocation information, and the system configuration and resource allocation information in the uplink transmission all belong to the system configuration and resource allocation information, the base station transmits the system configuration and allocation information to the terminal through controlling the channel, and the terminal After receiving the system configuration and resource allocation information on the control channel, communication is performed with the base station through the system configuration and resource allocation information, that is, the reception and transmission of data between the terminal and the base station.

The control channel in the wireless communication system will now be described in detail.

In a wireless communication system, the control channel is generally a synchronization channel (abbreviated as SCH), a broadcast control channel (BCCH), a unicast control channel, and a multicast control channel. Channel） and the like. The SCH is a "point majority" unidirectional control channel and the terminal completes the synchronous operation with the base station using the SCH. BCCH is also abbreviated as Broadcast Channel (BCH) under the premise that it is a control channel to discuss by default. Like SCH, BCH (or BCCH) is a "point majority" unidirectional control channel. Used to transmit or broadcast information Broadcast control channels typically require high stability and low error rates compared to normal data transmission for transmitting important system configuration and control information. have.

However, over time, due to the scarcity of current radio frequency stack spectrum resources and the deterioration of the radio channel environment, broadcast control channels typically have lower error rates in response to poor channel environments with lower modulation coding schemes. It consumes more radio resources.

In addition, in a wireless communication system based on the OFDMA technology, the radio resource is a two-dimensional time frequency domain resource composed of a time domain OFDM code and a frequency domain subframe, and the design of the control channel, in particular, the design of the physical structure is also OFDMA. Consideration should be given to the limitations of system resource mapping and interference suppression. A system based on the OFDMA technology belongs to a multi-carrier system, and the resource mapping process of the multi-carrier should consider the resource mapping problem in the frequency domain. Therefore, the resource mapping process of the multi-carrier and the resource mapping process of a single carrier have a very big difference. Therefore, the method of occupying the resources of the control channel in the OFDMA system must be consistent with the resource mapping design of the OFDMA system.

In addition, the problem of interference is an important difficulty limiting communication development. The OFDMA system adopts the Fractional Frequency Reuse (FFR) technology to proceed with interference suppression. The design of the control channel must meet the technical requirements of the FFR.

In addition, the current control channel requires a low error rate, resource mapping of the OFDMA system, interference suppression, and the like, but technical solutions for satisfying the above requirements by improving the applicability of the control channel have not been submitted.

Among the related technologies, problems that require low error rate of control channel, resource mapping of OFDMA system, and interference suppression are considered. It is therefore an object of the present invention to provide a method and apparatus for resource mapping of a control channel and thus to solve at least one of the problems described above.

In order to achieve the above object, the present invention provides a resource mapping method of the control channel.

According to the present invention, the problem of resource location and method occupied by the control channel is solved, and the performance of the control channel is improved. Frequency spectrum efficiency of wireless communication system based on OFDMA technology is secured.

1 illustrates a frame structure of a wireless communication system according to the related art.
2 illustrates a resource structure of a wireless communication system according to a related art.
3 shows a flowchart of a resource mapping method of a control channel according to the first embodiment of the present invention.
4 is a diagram illustrating a resource mapping process of a broadcast control channel in one frequency partition in the OFDMA / 5MHz system according to the first embodiment of the present invention.
5 is a flowchart illustrating a resource mapping method of a control channel according to the second embodiment of the present invention.
FIG. 6 is a diagram illustrating a resource mapping process of a broadcast control channel in two frequency partitions in the OFDMA / 5MHz system according to the second embodiment of the present invention.
FIG. 7 is a diagram illustrating a resource mapping process of a broadcast control channel in three frequency partitions in the OFDMA / 5MHz system according to the second embodiment of the present invention.
8 is a diagram illustrating a resource mapping process of a broadcast control channel in four frequency partitions in an OFDMA / 5MHz system according to a second embodiment of the present invention.
9 is a flowchart of a method for resource mapping of a control channel according to Embodiment 3 of the present invention;
FIG. 10 is a diagram illustrating a mapping process in which a broadcast control channel occupies a predetermined resource unit in an OFDMA / 5MHz system according to a third embodiment of the present invention.
FIG. 11 is a diagram illustrating a mapping process in which a broadcast control channel occupies a predetermined section in an OFDMA / 5MHz system according to a third embodiment of the present invention.
12 is a flowchart illustrating a resource mapping method of a control channel according to Method 4 of the present invention.
FIG. 13 is a diagram illustrating a mapping process occupied by a main sync channel in an OFDMA / 10MHz system according to a fourth embodiment of the present invention.
FIG. 14 is a diagram illustrating a mapping process occupied by a secondary synchronization channel in an OFDMA / 10MHz system according to a fourth embodiment of the present invention.

The present invention provides a resource mapping method of a control channel. In the resource mapping method of the control channel according to the present invention, the broadcast control channel is located on one frequency partition, and the frequency partition includes one or several distributed resource units, and the initial position of the broadcast control channel is set to the first of the frequency partition. It includes installation in distributed resource units. The partial frequency reuse coefficient corresponding to the frequency division is one of 1, 1/3, and 3.

Preferably, the configuration information of the frequency partition is determined and the location of the broadcast control channel is determined based on the configuration information. The configuration information includes the number of frequency partitions, the size of the frequency partitions, the number of subbands in the frequency partitions, and the frequency partitions. At least one of the number of mini-bands, the number of distributed resource units in the frequency partition, the number of consecutive resource units in the frequency partition.

The broadcast control channel includes a primary broadcast control channel and / or a secondary broadcast control channel. Preferably, the bandwidth occupied by the main broadcast control channel is less than or equal to the minimum system bandwidth, or the frequency difference between any two subcarriers occupied by the main broadcast control channel is less than or equal to the minimum system bandwidth.

In addition, the above-described method may further include occupying a fixed number of distributed resource units of the main broadcast control channel or obtaining a quantity of distributed resource units occupied by the main broadcast control channel through a blind detection.

In addition, the above-described method further indicates that the number of distributed resource units occupied by the sub-broadcast control channel in the main broadcast control channel or the terminal obtains the number of distributed resource units occupied by the sub-broadcast control channel through blind detection. Include.

Preferably, the above-described method further includes a distributed resource unit occupied by the main broadcast control channel and a distributed resource unit occupied by the sub-broadcast control channel being adjacent or non-contiguous. If the distributed resource units occupied by the and sub broadcast control channels are not adjacent to each other, the sub broadcast control channel indicates location information of the distributed resource units occupied by the main broadcast control channel.

The present invention provides a resource mapping method of a control channel.

In the resource mapping method of the control channel according to the present invention, since the broadcast control channel is located on a plurality of frequency partitions, each frequency partition includes one or several distributed resource units, and the initial position of the broadcast control channel is several frequencies. Installation on the first distributed resource unit in the compartment.

In several frequency partitions, the partial frequency reuse coefficients corresponding to each frequency are all 1/3 or 3, or the partial frequency reuse coefficient corresponding to one of the multiple partitions is 1 and the portion corresponding to the remaining frequency partitions. The frequency reuse factor is 1/3 or 3.

Preferably, the configuration information of several frequency partitions is determined and the location of the broadcast control channel is determined by the configuration information. The configuration information includes the number of frequency partitions, the size of each frequency partition, and the number of subbands in each frequency partition. At least one of the number of mini-bands in each frequency partition, the number of distributed resource units in each frequency partition, and the number of consecutive resource units in each frequency partition.

Preferably, the broadcast control channel includes a primary broadcast control channel and / or a secondary broadcast control channel. The bandwidth occupied by the main broadcast control channel is less than or equal to the minimum system bandwidth, or the frequency difference between any two subcarriers occupied by the main broadcast control channel is less than or equal to the minimum system bandwidth.

In addition, the above-described method also includes occupying a fixed number of distributed resource units of the main broadcast control channel or obtaining a quantity of distributed resource units occupied by the main broadcast control channel through a blind detection.

The distributed resource unit occupied by the main broadcast control channel and the distributed resource unit occupied by the sub broadcast control channel are adjacent or not adjacent to each other, and if the distributed resource unit occupied by the main broadcast control channel and the distributed resource unit occupied by the sub broadcast control channel If is not contiguous, it indicates the location information of the distributed resource unit occupied by the secondary broadcast control channel in the primary broadcast control channel.

In addition, the above-described method further indicates that the number of distributed resource units occupied by the secondary broadcast control channel in the primary broadcast control channel or the terminal obtains the quantity of distributed resource units occupied by the secondary broadcast control channel through blind detection. Include.

The present invention provides a resource mapping method of a control channel.

In the resource mapping method of the control channel according to the present invention, the quantity of all physical resource units is n and k physical resource units of n physical resource units constitute one frequency partition or several frequency partitions, and k Map some or all of the physical resource units of the physical resource unit to the distributed resource unit, n is greater than or equal to k, and if the broadcast control channel is installed in one or several frequency partitions, the initial position of the broadcast control channel Includes being installed on the first distributed resource unit of each frequency partition. The value of n is determined by at least one parameter of system bandwidth, multi-carrier frequency.

Preferably, a method of taking k physical resource units in a row on one side of the n physical resource units, a method of taking k physical resource units in a row in the middle of the n physical resource units, and a continuous k on both sides of the n physical resource units. Take k physical resource units according to one of the ways of taking the physical resource units.

The value of k is fixed or the value of k is determined by at least one parameter of system bandwidth, multi-carrier frequency configuration.

The partial frequency reuse coefficient corresponding to the frequency partition is one of one, one third, or three. The broadcast control channel includes a primary broadcast control channel and / or a secondary broadcast control channel.

In addition, the above-described method may also transmit data using resources not used to transmit the primary broadcast control channel and / or the secondary broadcast control channel in the frequency partition, or the primary broadcast control channel in the frequency partition, and / or Transmitting data without using resources not used to transmit the sub-broadcast control channel.

Preferably, the bandwidth occupied by the main broadcast control channel is less than or equal to the minimum system bandwidth, or the frequency difference between any two subcarriers occupied by the main broadcast control channel is less than or equal to the minimum system bandwidth.

Preferably, the main broadcast control channel occupies a fixed number of distributed resource units or the terminal obtains the quantity of distributed resource units occupied by the main broadcast control channel through a blind detection.

In addition, the above-described method further indicates the quantity and / or location of distributed resource units occupied by the secondary broadcast control channel in the primary broadcast control channel, or the terminal allocates the distributed resource units occupied by the secondary broadcast control channel through blind detection. Obtaining quantity and / or location.

The present invention provides a resource mapping method of a control channel.

In the resource mapping method of a control channel according to the present invention, a physical subcarrier on one or several orthogonal frequency multiplexing access codes is mapped to a distributed subcarrier, and a synchronization channel is installed on one or several orthogonal frequency multiplexing access codes. F. Distributed subcarriers include those used to carry a synchronization channel.

The synchronization channel includes a primary synchronization channel and a secondary synchronization channel. The bandwidth occupied by the primary synchronization channel is less than or equal to the minimum system bandwidth.

Preferably, the bandwidth occupied by the secondary sync channel is less than or equal to the minimum system bandwidth, or occupies the entire system bandwidth.

Preferably, the bandwidth occupied by the primary sync channel is less than or equal to the minimum bandwidth, or the frequency difference between any two subcarriers occupied by the primary sync channel is less than or equal to the minimum system bandwidth.

The partial frequency reuse coefficient corresponding to the subcarrier occupied by the primary sync channel is 1 and the partial frequency reuse coefficient corresponding to the subcarrier occupied by the subsync channel is 1/3 or 3.

The distributed subcarriers are subcarriers that are not completely contiguous or some contiguous subcarriers, and subcarriers that are not completely contiguous indicate that any two distributed subcarriers are not physically contiguous in both.

In addition, mapping a physical subcarrier on one or several orthogonal frequency division multiple access codes to a distributed subcarrier includes substituting a physical subcarrier for a distributed subcarrier according to a permutation unit, wherein the permutation unit is one subcarrier. As one of the carrier pairs, one carrier pair includes two subcarriers that are physically contiguous.

Preferably, one or several orthogonal frequency division multiple access codes are all first orthogonal frequency division multiple access codes in a subframe.

Through at least one technical solution of the present invention, through the resource mapping method of the control channel in the OFDMA system provided by the present invention, the problem of resource location and method occupied by the control channel is solved and the performance of the control channel is improved. The control channel meets various requirements such as low error rate, resource mapping of OFDMA system, and interference suppression among related technologies, and secures frequency spectrum efficiency of wireless communication system based on OFDMA technology.

Before describing an embodiment of the present invention, a brief description will be given of a resource mapping process of the OFDMA technique. Although the embodiments of the present invention have been described using the OFDMA technology as an example, the present invention is not limited thereto. The present invention can also be applied to multi-carrier systems such as Long Term Evolution (LTE), the Institute for Electrical and Electronic Engineers (IEEE) 802.11m, and other multi-carrier systems to come. have.

In a wireless communication system based on the OFDMA technology, the resource mapping process may be understood as a process of mapping a physical resource (for example, a physical subcarrier) to a logical resource (for example, a logical resource unit). For example, when the physical subcarriers are mapped to logical resource blocks, the base station implements scheduling for radio resources through scheduling for logical resource blocks. The main basis of resource mapping is the frame structure and resource structure of OFDMA system. In the frame structure, scheduling is performed by dividing radio resources into units of different grades in the time domain. For example, it is divided into a super frame, a frame, a subframe, and a symbol. For example, referring to FIG. 1, a radio resource is divided into super frames in the time domain. Each super frame includes four frames, each frame includes eight subframes, and each subframe includes six basic frames. It consists of an OFDM code. The actual communication system determines the number of OFDM codes specifically included in each class unit in the frame structure based on factors such as system bandwidth, coverage range, cyclic prefix length, and up / down switching interval that need support.

In addition, referring to FIG. 1, since the broadcast control channel is located in the first subframe of the head portion of the super frame, the broadcast control channel is also called a superframe header (abbreviated as SFH). The broadcast control channel includes a primary broadcast control channel and / or a secondary broadcast control channel. Thus, equivalently, the super frame header includes a primary super frame header and / or a sub super frame header. The sync channel includes a main sync channel and / or a sub sync channel, and the main sync channel and the sub sync channel are located on the first OFDM code among different frames.

The resource structure divides the available frequency band into several frequency partitions according to factors such as coverage range, FFR operation, terminal speed and work type that need support in the frequency domain, and divides frequency resources in the frequency partition into continuous resource zones and / or Alternatively, the scheduling is divided into distributed resource zones. Referring to FIG. 2, the available physical subcarriers of one subframe are divided into three frequency partitions, and each frequency partition is divided into continuous resource zones and distributed resource zones, thereby implementing scheduling activity. The invention may be divided into three, four or more frequency divisions, but the present invention is not limited thereto.

In the following examples, unless otherwise specified, n and k are integers greater than or equal to 1 and n is greater than or equal to k. The distributed resource zone indicates that all physical resource units are mapped to distributed resource units (DRUs). Subcarriers included in the DRUs are not completely contiguous or are contiguous in pairs. It may be continuous. A contiguous resource zone indicates that all physical resource units are mapped to contigous resource units (CRUs). Subcarriers included in CRUs are contiguous, and CRUs are abbreviated localized resource units (LLRUs). Also called）. Resource units after mapping are not physical and logical. For this reason, the DRU may be a Distributed Logical Resource Unit (abbreviated as DLRU) or a Logical Distributed Resource Unit (abbreviated as LDRU) and a CRU may be called a Contiguous Logical Resource Unit (CLRU). Logical Contiguous Resource Unit (abbreviated as LCRU). When not inconsistent, abbreviated as DRU and CRU. In addition, the control channel described below includes, but is not limited to, a synchronization channel and a broadcast control channel.

Based on this, according to the present invention, a control channel exists in design according to the characteristics of the frame structure (for example, the frame structure shown in FIG. 1) and the resource structure (for example, the resource structure shown in FIG. 2) of the OFDMA technology. In order to cope with the problem of performance and resource balance, the frequency mapping efficiency of the OFDMA wireless communication system is secured by submitting the resource mapping scheme of the control channel in the OFDMA system.

The embodiments of the present application and the features in the embodiments may be combined with each other under no conflict. The following describes the optimal embodiment of the present invention by combining the drawings. It is to be understood that the optimum embodiments described herein are used only to explain and interpret the present invention, but not to limit the present invention.

Method Example 1

An embodiment of the present invention provides a resource mapping method of a control channel.

3 is a flowchart of a resource mapping method of a control channel according to an embodiment of the present invention. For convenience of description, the technical solutions of the method embodiments of the present invention are described and described in the form of steps in FIG. 3, and the steps shown in FIG. 3 may be executed in a computer system of a set of computer executable instructions. Although the logical sequence is shown in FIG. 3, the steps shown or described in a different order from that herein may be performed under some circumstances. As shown in Fig. 3, the method includes the following steps (step S302 to step S304).

In step S302, the broadcast control channel is located in one frequency partition, that is, the broadcast control channel is installed on one frequency partition, and the frequency partition includes one or several distributed resource units. The frequency reuse coefficient is one of 1, 1/3, and 3, and the configuration information of the frequency partition is determined (that is, the frequency partition has the determined configuration information and is scheduled, and the terminal needs to acquire and notify in advance. Can be determined based on the configuration information, and the configuration information includes the number of frequency divisions, the size of the frequency divisions, the number of subbands in the frequency division, the number of mini bands in the frequency division, and the frequency division. At least one of the number of distributed resource unit of the number, the number of continuous resource unit of the frequency partition.

In step S304, the initial position of the broadcast control channel is installed on the first distributed resource unit of the frequency partition, and the physical bandwidth occupied by the broadcast control channel is less than or equal to the minimum system bandwidth.

The above-described control channel includes a main broadcast control channel and a sub broadcast control channel. The main broadcast control channel occupies a fixed number or a predetermined number of distributed resource units and the number of distributed resource units occupied by the sub broadcast control channel. The method of obtaining distributed resource units occupied by the main broadcast control channel includes a method in which the main broadcast control channel occupies a fixed number of distributed resource units, and a terminal distributed by the main broadcast control channel through blind detection. The method of obtaining a distributed resource unit occupied by the secondary broadcast control channel may be one of a method of obtaining the quantity of resource units, and the method of obtaining a distributed resource unit occupied by the secondary broadcast control channel and indicating the quantity of distributed resource units occupied by the secondary broadcast control channel; The terminal obtains the quantity of distributed resource units occupied by the sub-broadcasting control channel through the blind detection. One can. For example, in a specific embodiment, the terminal may obtain configuration information of the frequency partition in advance and determine the position of the control channel through the configuration information, and the terminal may fix the occupation of the main broadcast control channel through the blind detection. A distributed resource unit of a predetermined quantity or a predetermined quantity is obtained, and a quantity of distributed resource units occupied by the sub broadcast control channel is obtained. The primary broadcast control channel occupies the determined resource quantity or the occupied resource quantity can be obtained through blind detection, and the resource quantity occupied by the secondary broadcast control channel is indicated by the primary broadcast control channel. For example, the quantity of information required for transmission of the main broadcast control channel is fixed, but one of several fixed modulation coding schemes may be employed, and thus the occupied resource quantity and the actually employed modulation coding scheme are associated. However, if only the initial position of the main broadcast control channel is determined, resource quantity information can be obtained through blind detection and possible modulation coding schemes.

The bandwidth occupied by the main broadcast control channel may be such that the bandwidth occupied by the main broadcast control channel is less than or equal to the minimum system bandwidth, or the frequency difference between any two subcarriers occupied by the main broadcast control channel is less than the minimum system bandwidth. Or one of the same conditions must be met. For example, referring to FIG. 4, the bandwidth occupied by the broadcast control channel is a bandwidth smaller than 5 MHz, which is the minimum system bandwidth. Therefore, the bandwidth occupied by the main broadcast control channel is inevitably smaller than the minimum system bandwidth of 5 MHz.

In addition, the distributed resource unit occupied by the main broadcast control channel and the distributed resource unit occupied by the sub broadcast control channel may or may not be adjacent to each other, if the distributed resource unit occupied by the main broadcast control channel and the sub broadcast control channel are occupied. If the distributed resource unit to be occupied is not adjacent to each other, the location information of the distributed resource unit occupied by the secondary broadcast control channel in the primary broadcast control channel can be indicated.

The present invention provides a resource mapping method of a control channel in an OFDMA system, and solves the problem of resource location and method occupied by a broadcast control channel by installing a broadcast control channel on a distributed resource unit of one frequency partition. The performance of the broadcast control channel is improved, and the broadcast channel can meet various requirements such as low error rate, resource mapping of the OFDMA system, and interference suppression, thereby simplifying the process of identifying the control channel by the terminal. The frequency spectrum efficiency of the wireless communication system is based.

Example 1

4 is a diagram illustrating a resource mapping process of a broadcast control channel in one frequency partition in the OFDMA / 5MHz system according to the first embodiment of the present invention. First, a process of obtaining a frequency segment in a 5 MHz system wireless communication system will be described with reference to FIG. 4 as an example. The Fast Fourier Transform (abbreviated as FFT) of the 5MHz system has a score of 512, the number of available subcarriers in the subframe is 432, divided into 24 physical resource units, and the size of each medium is 18 * 6. Here, the process of obtaining the frequency division is as follows. First, 24 physical resource units are divided into several subbands, and each subband includes a contiguous N1 physical resource units. For example, if N1 = 4, there are six subbands. Substitution is performed on the subband or K _SB subbands are taken at the same interval in the subband. For example, K _SB = 3. Employing matrix substitution, the substitution matrix is [0, 1; 2, 3; 4, 5], then the order before substitution is [0, 1, 2, 3, 4, 5, 6] and the order after substitution is [0, 2, 4, 1, 3, 5]. The remaining physical resource units are divided into several minibands, and each subband includes consecutive N2 physical resource units. For example, when N1 = 1, 12 minibands are used and the substitution operation is performed on the minibands. The obtained subbands and minibands are mapped to one frequency partition, and all PRUs in the next frequency partition are mapped to continuous resource units (subcarriers in the continuous resource units) and distributed resource units, as shown in FIG. All 12 resource units, i.e., [0, 1, 2, 3, 8, 9, 10, 11, 16, 17, 18, 19] are consecutive resource units and the remaining 12 resource units are subcarrier substitution operations. Proceed to obtain distributed resource unit, and the substitution unit is one subcarrier or a pair of subcarriers. For example, the distributed resource unit obtained by substituting at this time is a logical resource unit. Therefore, it can be called a distributed logical resource unit and the corresponding contiguous resource unit is called a contiguous logical resource unit and abbreviated as DRU and CRU when there is no contradiction. Others are similar and do not describe further.

As shown in Fig. 4, when the partial frequency reuse coefficient of the frequency partition is 1, the broadcast control channel is located in the first and second of the distributed resource units and broadcast when the partial frequency reuse coefficient of the frequency partition is 1/3 or 3. The control channel occupies the first two distributed resource units of each sector. The quantity of resource units used to transmit the actual control channel is determined by the amount of information that the control channel needs to transmit. The above example is only used for the description as occupying only two distributed resource units, but is not limited thereto.

Method Example 2

An embodiment of the present invention provides a resource mapping method of a control channel.

5 is a flowchart of a resource mapping method according to an embodiment of the present invention, and includes the following processing (steps S502 to S504), as shown in FIG.

In step S502, the broadcast control channel is located in several frequency partitions, each frequency partition including one or several distributed resource units, and the partial frequency reuse coefficients corresponding to each frequency partition are all 1/3 or 3, or In the several frequency partitions described above, the partial frequency reuse coefficient corresponding to one frequency partition is 1 and the partial frequency reuse coefficient corresponding to the remaining frequency partition is 1/3 or 3.

Then, the configuration information of the frequency section is determined corresponding to each frequency section (i.e., the frequency section has the determined configuration information and is scheduled and does not need to be notified in advance by the terminal). The location of the broadcast control channel can be determined by using the configuration information. And at least one of a quantity of consecutive resource units in the frequency partition.

In step S504, the initial position of the broadcast control channel is installed on the first distributed resource unit of several frequency segments.

The aforementioned control channel includes a main broadcast control channel and a sub broadcast control channel. The main broadcast control channel occupies a fixed number or a predetermined number of distributed resource units, and the number of distributed resource units occupied by the sub broadcast control channel. The method of obtaining distributed resource units occupied by the main broadcast control channel includes a method in which the main broadcast control channel occupies a fixed number of distributed resource units, and a terminal distributed by the main broadcast control channel through blind detection. The method of obtaining a distributed resource unit occupied by the sub-broadcast control channel may be one of a method of obtaining a quantity of resource units, and a method of indicating a quantity of distributed resource units occupied by the sub- broadcast control channel by the main broadcast control channel; The terminal obtains the quantity of distributed resource units occupied by the sub-broadcasting control channel through the blind detection. One can. For example, in a specific embodiment, the terminal may obtain configuration information of the frequency partition in advance, and determine the position of the control channel through the configuration information, and the terminal may fix the primary broadcast control channel occupied by blind detection. Obtain a distributed resource unit of a quantity or a predetermined quantity and obtain a quantity of distributed resource units occupied by the sub broadcast control channel. The primary broadcast control channel occupies the determined resource quantity, or the occupied resource quantity can be obtained through blind detection, and the resource quantity occupied by the secondary broadcast control channel is indicated by the primary broadcast control channel. For example, the quantity of information required for transmission of the main broadcast control channel is fixed, but one of several fixed modulation coding schemes may be adopted. Therefore, the number of resources occupied and the modulation coding scheme actually employed are related. However, if only the initial position of the main broadcast control channel is determined, resource quantity information can be obtained through blind detection and possible modulation coding schemes.

The bandwidth occupied by the main broadcast control channel is less than or equal to the minimum system bandwidth of the bandwidth occupied by the main broadcast control channel, or the frequency difference between any two subcarriers occupied by the main broadcast control channel is smaller than the minimum system bandwidth. Or one of the same conditions must be met. For example, referring to Figs. 6, 7, and 8, the bandwidth occupied by the broadcast control channel is a bandwidth smaller than 5 MHz, which is the minimum system bandwidth. Therefore, the bandwidth occupied by the main broadcast control channel is inevitably smaller than the minimum system bandwidth of 5 MHz.

In addition, the distributed resource unit occupied by the main broadcast control channel and the distributed resource unit occupied by the sub broadcast control channel may or may not be adjacent to each other, if the distributed resource unit occupied by the main broadcast control channel and the sub broadcast control channel are occupied. If the distributed resource unit to be occupied is not adjacent to each other, the location information of the distributed resource unit occupied by the secondary broadcast control channel in the primary broadcast control channel can be indicated.

The present invention provides a resource mapping method of a control channel in an OFDMA system, and solves the problem of resource location and method occupied by a broadcast control channel by installing a broadcast control channel on a distributed resource unit of one frequency partition. The performance of the broadcast control channel is improved, and the broadcast channel can meet various requirements such as low error rate, resource mapping of the OFDMA system, and interference suppression, thereby simplifying the process of identifying the control channel by the terminal. The frequency spectrum efficiency of the wireless communication system is based.

The method of Example 2 will be described by combining Example 2, Example 3 and Example 4 below.

Example 2

6 illustrates a resource mapping process of a broadcast control channel in two frequency partitions in the OFDMA / 5MHz system of the present invention. The resource mapping process of Example 1 and FIG. 4 is similar. The difference is that FIG. 4 includes one frequency partition while FIG. 6 includes two frequency partitions.

As shown in Fig. 6, the frequency partition 0 and the frequency partition 1 are included, where the frequency partition 0 has a partial frequency reuse coefficient of 1 and the frequency partition 1 has a 1/3 frequency reuse coefficient. Here, frequency partition 0 includes two subbands, four minibands, and a total of 12 physical resource units, and frequency partition 1 includes one subband, eight minibands, and a total of 12 physical resource units. The eight physical resource units are contiguous resource units, the latter four are distributed resource units, the first four physical resource units in frequency section 1 are the contiguous resource units, and the latter eight physical resource units are distributed resource units. In a frequency partition to which a resource can be mapped, there is a frequency partition with a partial frequency reuse coefficient of 1 or 1/3.

Since a broadcast control channel can only be in a frequency partition having a frequency reuse coefficient of 1 or a frequency partition having a frequency reuse coefficient of 1/3, that is, a broadcast control channel cannot transmit while transmitting on frequency partition 0 and on frequency partition 1. One frequency division shall be selected from frequency division 0 and frequency division 1. That is, when there are several frequency partitions, the broadcast control channel cannot appear simultaneously in frequency partitions having frequency reuse coefficients of 1 and 1/3.

Example 3

7 illustrates a resource mapping process of a broadcast control channel in three frequency divisions in the OFDMA / 5MHz system of the present invention, and the resource mapping process of Example 2 and Example 1 is similar. The difference is that FIG. 6 includes two frequency partitions, while FIG. 7 includes three frequency partitions.

As shown in Fig. 7, a frequency section 0, a frequency section 1, and a frequency section 2 are included, wherein the frequency partition 0 has a partial frequency reuse factor of 1 and the frequency partition 1 has a partial frequency reuse factor of 2/3. And the partial frequency reuse coefficients of frequency section 2 are all 1/3. Thus, the frequency control section 0 and the frequency control section 2 are selected to design a broadcast control channel, and there are frequency partitions having frequency reuse coefficients of 1 and 1/3, and the broadcast control channel design is similar to that of FIG.

Example 4

FIG. 8 illustrates a resource mapping process of a broadcast control channel in four frequency divisions in the OFDMA / 5MHz system of the present invention. The resource mapping processes of Example 3 and Example 2 are similar. The difference is that FIG. 7 includes three frequency partitions, while FIG. 8 includes four frequency partitions.

As shown in Fig. 8, the frequency partition 0, the frequency partition 1, the frequency partition 2, and the frequency partition 3 are included, and the frequency partition 0 has a partial frequency reuse coefficient of 1 and the frequency partition 1, frequency partition 2, and frequency partition 3 The partial frequency reuse coefficients of are all 2/3. Since there is no frequency partition with a partial frequency reuse coefficient of 1/3, the broadcast control channel can only occupy distributed resource units in the frequency partition 0.

Method Example 3

An embodiment of the present invention provides a resource mapping method of a control channel.

FIG. 9 is a flowchart of a resource mapping method of a control channel according to the second embodiment of the present invention, and includes the following processing (steps S902 to S904), as shown in FIG.

In step S902, the quantity of all physical resource units is n and k physical resource units of the n physical resource units constitute one frequency partition or several frequency partitions, and the frequency reuse coefficient of the frequency partition is 1, 1/3. Or one of three. Some or all of the k physical resource units in the frequency partition are mapped to distributed resource units, and the remaining (nk) physical resource units are contiguous physical resource units, so the value n takes is greater than the value k takes. The value of n may be determined by at least one parameter of the system bandwidth, multi-carrier frequency configuration, and k may be fixed, and may be determined by at least one parameter of the system bandwidth, multi-carrier frequency configuration.

In step S904, a broadcast control channel is installed on the one or more frequency partitions, where the initial position of the broadcast control channel is located on the first distributed resource unit of the frequency partition and the physical bandwidth occupied by the control channel is the minimum system bandwidth. Is less than or equal to

The control channel may include only a main broadcast control channel or may include a main broadcast control channel and a sub broadcast control channel. If only the main broadcast control channel is included, the distributed resource unit in the frequency partition is used only to carry the main broadcast control channel, and if it contains the main broadcast control channel and the sub broadcast control channel, the distributed resource unit in the frequency partition is associated with the main broadcast control channel. Used to carry a sub broadcast control channel. Here, the primary broadcast control channel occupies a fixed quantity or a predetermined quantity of distributed resource units and indicates the quantity of distributed resource units occupied by the secondary broadcast control channel.

The primary broadcast control channel occupies a fixed quantity or a predetermined quantity of distributed resource units and indicates the quantity of distributed resource units occupied by the secondary broadcast control channel. A method of obtaining distributed resource units occupied by the primary broadcast control channel The primary broadcast control channel may be one of a method of occupying a fixed quantity of distributed resource units, and a method of obtaining a quantity of distributed resource units occupied by the main broadcast control channel through a blind detection. The method of obtaining a distributed resource unit for occupancy includes a method in which the primary broadcast control channel indicates the quantity of distributed resource units occupied by the secondary broadcast control channel, and the quantity of distributed control channels occupied by the secondary broadcast control channel through the blind detection by the terminal. It may be one of the ways to obtain. For example, in a specific embodiment, the terminal may obtain configuration information of the frequency partition in advance and determine the position of the control channel through the configuration information, and the terminal may fix the occupation of the main broadcast control channel through the blind detection. A distributed resource unit of a predetermined quantity or a predetermined quantity is obtained, and a quantity of distributed resource units occupied by the sub broadcast control channel is obtained. The primary broadcast control channel occupies the determined resource quantity, or the occupied resource quantity can be obtained through blind detection, and the resource quantity occupied by the secondary broadcast control channel is indicated by the primary broadcast control channel. For example, the quantity of information required for transmission of the main broadcast control channel is fixed, but one of several fixed modulation coding schemes may be adopted. Therefore, the number of resources occupied and the modulation coding scheme actually employed are related. However, if only the initial position of the main broadcast control channel is determined, resource quantity information can be obtained through blind detection and possible modulation coding schemes.

The bandwidth occupied by the main broadcast control channel is equal to or less than the minimum system bandwidth of the bandwidth occupied by the main broadcast control channel, and the frequency difference between any two subcarriers occupied by the main broadcast control channel is smaller than the minimum system bandwidth. One of the same conditions must be met.

In addition, data may be transmitted using a resource other than the resource used to transmit the main broadcast control channel and / or the sub broadcast control channel in the frequency partition.

For example, the OFDMA system includes n physical resource units and takes k physical resource units among the n physical resource units and uses them to transmit a broadcast control channel. The k physical resource units constitute one frequency partition and the remaining (n-k) physical resource units perform normal resource mapping. The terminal obtains the configuration information of the frequency partition in advance, determines the position of the control channel through the configuration information, and obtains the fixed resource or the predetermined number of distributed resource units occupied by the main broadcast control channel through blind detection, and then obtains the sub broadcast control channel. Get the quantity of this distributed resource unit.

take k consecutive physical resource units from one side of n physical resource units, take k consecutive physical resource units in the middle of n physical resource units, and take k consecutive physical resources from both sides of n physical resource units You can select k physical resource units according to one of the ways to take them.

For example, assuming a minimum system bandwidth of 5 MHz, a 10 MHz system possibly contains 48 resource units, i.e. n = 48, if taking 24 consecutive physical resource units in the middle, the bandwidth is 5 MHz, i.e. k = 24, the selected 24 physical resource units are [12, 13, 14, ..., 35] and the remaining physical resource units are [0, 1, 2, ..., 9, 10, 11] and [36]. , 37, 38, ..., 45, 46, 47].

Example 5 and Example 6 will be combined below to provide a detailed description of Method Example 3 of the present invention.

Example 5

FIG. 10 is a mapping process in which a broadcast control channel occupies a predetermined resource unit in an OFDMA / 5MHz system according to a method embodiment of the present invention. As shown in FIG. 10, an FFT score of a 5MHz system is 512 and is available in a subframe. The subcarriers are divided into 432, 24 physical resource units, and the size of each medium is 18 * 6.

The detailed mapping process is as follows. First, 24 physical resource units take a certain number of physical resource units, and the specific quantity is requested by the broadcast control channel to the amount of data that needs to be transmitted. For example, when two physical resource units 0 and 23 are taken, these two resource units It is used to obtain two distributed resource units through subcarrier corresponding class substitution for and to load a broadcast control channel. The remaining 22 physical resource units perform the resource mapping shown in Examples 1 to 3.

Example 6

FIG. 11 is a mapping process in which a broadcast control channel occupies a predetermined section in an OFDMA / 5 MHz system. As shown in FIG. 11, the FFT score of a 5 MHz system is 512, and there are 432 usable subcarriers in a subframe. It is divided into 24 physical resource units and the size of each medium is 18 * 6.

The detailed mapping process is as follows. First, 24 physical resource units take a certain number of physical resource units, and the specific quantity is requested by the broadcast control channel to the amount of data that needs to be transmitted. Can be taken from one side. For example, the starting side takes four consecutive physical resource units 0, 1, 2, and 3 and uses one of these four resource units to form a control channel for loading control channels and four within the compartment. Subcarrier corresponding class substitution is performed for the physical resource units to obtain four distributed resource units, and the resource mapping shown in Examples 1 to 3 is performed for the remaining 20 physical resource units.

Method Example 4

An embodiment of the present invention provides a resource mapping method.

12 is a flowchart of the resource mapping method according to the fourth embodiment of the present invention, and includes the following processing (steps S1202-S1204), as shown in FIG.

In step S1202, the physical subcarriers on one or several orthogonal frequency division multiple access codes are mapped to distributed subcarriers, and the one or several orthogonal frequency division multiple access codes described above are all the first orthogonal frequency division multiplexing in the corresponding subframe. It is an access code and specifically, a physical subcarrier on an orthogonal frequency division multiple access code can be replaced by a distributed subcarrier according to a substitution unit, and a substitution unit is one of one subcarrier and one carrier pair, and one carrier pair is two A subcarrier comprising a physically contiguous subcarrier of a distributed subcarrier comprising a subcarrier that is not completely contiguous or some contiguous subcarrier; and a subcarrier that is not completely contiguous indicates that any two Point.

In step S1204, a synchronization channel is installed on one or several orthogonal frequency division multiple access codes, where a distributed subcarrier is used to carry the synchronization channel.

The above-described sync channel may include a main sync channel and a sub sync channel. The band occupied by the main sync channel is less than or equal to the minimum system bandwidth, and specifically, between any two subcarriers occupied by the main sync channel. The frequency difference may be less than or equal to the minimum system bandwidth, the bandwidth occupied by the secondary synchronization channel may be less than or equal to the minimum system bandwidth, and the secondary synchronization channel may occupy the entire system band.

In addition, the partial frequency reuse coefficient corresponding to the subcarrier occupied by the primary sync channel may be 1 and the partial frequency reuse coefficient corresponding to the subcarrier occupied by the subsync channel may be 1/3 or 3.

Example 7 and Example 8 will be described below with reference to the method shown in the fourth embodiment of the present invention.

Example 7

FIG. 13 is a diagram illustrating a mapping process occupied by a main synchronization channel in an OFDMA / 10MHz system according to an embodiment of the present invention. As shown in FIG. 13, an FFT score of a 10MHz system is 1024.

The detailed mapping process is as follows. First, a subcarrier within an intermediate 5 MHz of 10 MHz is taken. That is, 512 subcarriers are taken and available subcarriers of the 512 subcarriers are 432 subcarriers. Subsequently, a subcarrier substitution operation is performed on the 432 available subcarriers, and since the substitution unit is one physical subcarrier or one subcarrier pair, the aforementioned available subcarriers are mapped to the distributed subcarriers. The partial frequency reuse coefficient to which the carrier corresponds is one. Finally, the primary sync channel is loaded using this distributed subcarrier. That is, the main synchronization sequence is modulated and transmitted on this distributed subcarrier.

Example 8

FIG. 14 is a diagram illustrating a mapping process occupied by an auxiliary sync channel in an OFDMA / 10MHz system according to a method embodiment of the present invention. As shown in FIG. 14, an FFT score of a 10MHz system is 1024.

The detailed mapping process is as follows. First, an available subcarrier in the middle of 10 MHz is taken. For example, it is assumed that an available subcarrier can be obtained by removing a guard subcarrier and a DC carrier, and the number of available subcarriers is 864. Subsequently, the subcarrier substitution operation is performed on the 864 available subcarriers, and since the substitution unit is one physical subcarrier or one subcarrier pair, the aforementioned available subcarriers are mapped to the distributed subcarriers. The partial frequency reuse coefficient to which the carrier corresponds is 1/3 or 3. Finally, sub-channels are loaded using these distributed subcarriers. That is, the sub-synchronous sequence is modulated and transmitted on such a distributed subcarrier.

As described above, the present invention provides a resource mapping method and / or apparatus for a control channel provided by the present invention. The present invention provides a resource mapping method for a control channel in an OFDMA system, and a resource location and method problem occupied by a broadcast control channel. The broadcast control channel can meet various requirements such as low error rate among the related technologies, resource mapping of the OFDMA system, interference suppression, etc., thus simplifying the process of identifying the control channel by the terminal and wireless communication based on the OFDMA technology. The frequency spectrum efficiency of the system is ensured.

What has been described above is only the best embodiment of the present invention and is not used to limit the present invention. When referring to the technical personnel of the art, the present invention may have various changes and changes. All changes, equivalents made within the spirit and principles of the invention

Replacement, improvement and the like should all fall within the protection scope of the present invention.

Claims (34)

In the resource mapping method of the control channel,
The broadcast control channel is located on one frequency partition, and the frequency partition includes one or several distributed resource units.
And installing the initial position of the broadcast control channel on the first distributed resource unit of the frequency partition.
The method of claim 1,
And a partial frequency reuse coefficient corresponding to the frequency partition is one of one, one third, and one third.
The method of claim 1,
The configuration information of the frequency partition is determined and the location of the broadcast control channel is determined based on the configuration information. The configuration information includes the number of frequency partitions, the size of the frequency partition, the number of subbands in the frequency partition, and the frequency partition. And at least one of the number of mini-bands among the plurality of mini-bands, the number of distributed resource units in the frequency partition, and the number of consecutive resource units in the frequency partition.
The method according to any one of claims 1 to 3,
And the broadcast control channel comprises at least one of a primary broadcast control channel and a secondary broadcast control channel.
5. The method of claim 4,
The bandwidth occupied by the main broadcast control channel is less than or equal to the minimum system bandwidth, or the frequency difference between any two subcarriers occupied by the main broadcast control channel is less than or equal to the minimum system bandwidth. Resource mapping method.
5. The method of claim 4,
Wherein the main broadcast control channel occupies a fixed number of distributed resource units, or the terminal obtains the number of distributed resource units occupied by the main broadcast control channel through blind detection. Resource mapping method.
5. The method of claim 4,
Indicating the quantity of distributed resource units occupied by the secondary broadcast control channel in the primary broadcast control channel, or further comprising the terminal obtaining the quantity of distributed resource units occupied by the secondary broadcast control channel through blind detection. Resource mapping method of a control channel characterized in that.
5. The method of claim 4,
The distributed resource unit occupied by the main broadcast control channel and the distributed resource unit occupied by the sub broadcast control channel are adjacent to each other or are not adjacent to each other. If the distributed resource unit occupied by the main broadcast control channel and the sub broadcast control channel are occupied, And if the distributed resource units are not adjacent to each other, indicating the location information of the distributed resource unit occupied by the sub-broadcast control channel in the main broadcast control channel.
In the resource mapping method of the control channel,
Since the broadcast control channel is located on several frequency partitions, each frequency partition includes one or several distributed resource units, and the initial position of the broadcast control channel is installed on the first distributed resource unit of several frequency partitions. Resource mapping method of the control channel, characterized in that it comprises.
10. The method of claim 9,
In the several frequency divisions, the partial frequency reuse coefficients corresponding to each frequency are all 1/3 or 3, or
And a partial frequency reuse coefficient corresponding to one of the plurality of frequency partitions is 1 and a partial frequency reuse coefficient corresponding to the remaining frequency partitions is 1/3 or 3.
10. The method of claim 9,
Configuration information of the plurality of frequency partitions is determined and the location of the broadcast control channel is determined based on the configuration information. The configuration information includes a quantity of frequency partitions, a size of each frequency partition, and a subband of each frequency partition. And at least one of a quantity, a number of mini bands in each frequency partition, a quantity of distributed resource units in each frequency partition, and a quantity of consecutive resource units in each frequency partition.
The method according to any one of claims 9 to 11,
And the broadcast control channel comprises at least one of a primary broadcast control channel and a secondary broadcast control channel.
The method of claim 12,
The bandwidth occupied by the main broadcast control channel is less than or equal to the minimum system bandwidth, or
And a frequency difference between any two subcarriers occupied by the main broadcast control channel is less than or equal to a minimum system bandwidth.
The method of claim 12,
The main broadcast control channel occupies a fixed number of distributed resource units, or
The terminal further comprises obtaining the quantity of distributed resource units occupied by the main broadcast control channel through the blind detection.
The method of claim 12,
The distributed resource unit occupied by the main broadcast control channel and the distributed resource unit occupied by the sub broadcast control channel are not adjacent or adjacent to each other, and if the distributed resource unit occupied by the main broadcast control channel and the sub broadcast control channel are occupied, And if the distributed resource units are not adjacent to each other, indicating the location information of the distributed resource unit occupied by the sub-broadcast control channel in the main broadcast control channel.
The method of claim 12,
Indicating the number of distributed resource units occupied by the sub broadcast control channel in the main broadcast control channel, or
The terminal further comprises obtaining a quantity of distributed resource units occupied by the sub-broadcast control channel through the blind detection.
In the resource mapping method of the control channel,
The quantity of all physical resource units is n and k resource units of the n physical resource units constitute one frequency partition or several frequency partitions, and some or all of the physical resource units of k physical resource units of the frequency partition Maps to distributed resource units, where n is greater than or equal to k,
A broadcast control channel is installed in the one or several frequency partitions, wherein the initial position of the broadcast control channel comprises installing on the first distributed resource unit of each frequency partition. Way.
18. The method of claim 17,
And the value of n is determined by at least one parameter of a system bandwidth and a multicarrier frequency.
18. The method of claim 17,
A method of taking k physical resource units consecutively on one side of the n physical resource units, A method of taking k physical resource units consecutively in the middle of the n physical resource units, and k physically continuous on both sides of the n physical resource units And k physical resource units according to one of the methods of taking the resource units.
18. The method of claim 17,
The value of k is fixed, or
The value k is determined by at least one parameter of a system bandwidth and a multi-carrier frequency configuration.
18. The method of claim 17,
And the partial frequency reuse coefficient corresponding to the frequency partition is one of one, one third, or three.
The method according to any one of claims 17 to 21,
And the broadcast control channel comprises at least one of a primary broadcast control channel and a secondary broadcast control channel.
The method of claim 22,
Transmitting data using a resource not used to transmit at least one of the main broadcast control channel and the sub broadcast control channel in the frequency partition; or
And transmitting data without using a resource not used to transmit the primary broadcast control channel and / or the secondary broadcast control channel in the frequency partition.
The method of claim 22,
The bandwidth occupied by the main broadcast control channel is less than or equal to the minimum system bandwidth, or
And a frequency difference between any two subcarriers occupied by the main broadcast control channel is less than or equal to the minimum system bandwidth.
The method of claim 22,
The main broadcast control channel occupies a fixed number of distributed resource units, or
The terminal obtains the quantity of distributed resource units occupied by the main broadcast control channel through blind detection.
The method of claim 22,
Indicating the quantity or position of the distributed resource unit occupied by the sub-broadcast control channel in the primary broadcast control channel, or both the quantity and the position; or
The terminal further comprises obtaining the quantity or position of the distributed resource unit occupied by the sub-broadcast control channel through blind detection, or both the quantity and the position.
In the resource mapping method of the control channel,
Mapping a physical subcarrier on one or several orthogonal frequency multiple division access codes to a distributed subcarrier,
A sync channel is installed on the one or more orthogonal frequency multiplexed access codes, wherein the distributed subcarriers include those used to carry the sync channel,
Wherein the one or more orthogonal frequency division multiple access codes are all first orthogonal frequency division multiple access codes in subframes.
28. The method of claim 27,
The sync channel includes a primary sync channel and a secondary sync channel, wherein the bandwidth occupied by the primary sync channel is less than or equal to the minimum system bandwidth.
29. The method of claim 28,
The bandwidth occupied by the sub-sync channel is less than or equal to the minimum system bandwidth, or occupies the entire system bandwidth.
29. The method of claim 28,
The bandwidth occupied by the primary sync channel is less than or equal to the minimum bandwidth, wherein the frequency difference between any two subcarriers occupied by the primary sync channel is less than or equal to the minimum system bandwidth. Way.
29. The method of claim 28,
The partial frequency reuse coefficient corresponding to the subcarrier occupied by the primary sync channel is 1 and the partial frequency reuse coefficient corresponding to the subcarrier occupied by the subsync channel is 1/3 or 3, the resource of the control channel Mapping method.
32. The method of any one of claims 27-31,
The distributed subcarriers are subcarriers that are not completely contiguous or partly contiguous subcarriers. The subcarriers that are not completely contiguous indicate that any two distributed subcarriers are not physically contiguous. Mapping method.
32. The method of any one of claims 27-31,
Mapping a physical subcarrier on the one or several orthogonal frequency division multiple access codes to a distributed subcarrier,
Substituting a physical sub-carrier with a distributed sub-carrier according to a substitution unit, wherein the substitution unit is one of one sub-carrier, one carrier pair, the one carrier pair includes two sub-carriers physically continuous Resource mapping method of the control channel comprising a.
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